I enjoy taking portraits as well, and I must say this is very impressive, my only advice is leave it AS IS! This would be a perfect 'beauty shot' for the model's portfolio or as an advertisement for men's cologne...who is the subject? hmmmmmmmmm you?

I think I would like it better if cropped about an inch off the top. There's too much forehead IMHO. Cropping it a little tighter really brings out the pensive expression you have caught in the photo, and really draws the eye to the eye LOL! I tried it just by scrolling with my browser, and it really made the mood jump right out at me when i did it.

Nice portrait. I prefer the BW version. I think the highlights in the upper right corner and along the edge by the nose are distracting; possibly they could be burned in a bit. If the shot were to be re-shot, I'd say light the eye a little more.